Genuine Motorola SM8S24A TVS Diode for Voltage Surge Protection
The Motorola 48012043001 is a high-performance SM8S24A transient voltage suppressor diode designed for professional repair and maintenance of Motorola radio equipment. This genuine OEM component provides critical circuit protection against voltage spikes, electrostatic discharge, and transient overvoltage conditions that can damage sensitive radio electronics. The SMA package offers robust protection in a compact surface-mount form factor.
Key Features
- Genuine Motorola factory replacement part - ensures reliable circuit protection
- SM8S24A series 24V standoff voltage transient suppressor
- High surge current capability for effective transient absorption
- Bidirectional protection against positive and negative voltage spikes
- Fast response time for immediate overvoltage clamping
- Low clamping voltage to protect sensitive semiconductor components
- SMA (DO-214AC) surface-mount package for space-efficient installation
Compatible Models
- Various Motorola commercial and professional two-way radio models
- Used in power supply protection, antenna input protection, and interface circuits
- Consult your radio's service manual or schematic diagram for exact component location
What's Included
- One (1) Motorola SM8S24A transient voltage suppressor diode
Application and Installation
Professional Installation Required: This transient voltage suppressor diode is a critical protection component that requires proper installation to ensure effective circuit protection. Installation should only be performed by qualified electronics technicians or certified Motorola service centers with experience in SMD component replacement. Improper installation or incorrect component orientation can result in inadequate protection or component failure during transient events.
TVS diodes are strategically placed throughout radio circuits to protect against various overvoltage threats. Common applications include power supply input protection, antenna port ESD protection, audio line surge suppression, data interface protection, and battery voltage spike clamping. The SM8S24A with its 24V standoff voltage is ideal for protecting circuits operating at lower DC voltages while providing rapid clamping action during transient events.
Critical Installation Notes: TVS diodes are typically installed in parallel with the circuit being protected, positioned between the signal line and ground. Verify proper polarity orientation if using the diode in a unidirectional configuration, although the SM8S24A can function bidirectionally. Ensure solder joints are clean and secure to maintain low impedance path for transient currents. The component should be placed as close as possible to the protection point for maximum effectiveness.
Keep lead lengths and PCB traces short to minimize inductance, which can reduce protection effectiveness during fast transients. After installation, verify circuit operation and test voltage levels to ensure the TVS diode is not conducting during normal operation. The diode should only activate during overvoltage transient events.
When to Replace
TVS diodes can fail due to repeated exposure to high-energy transients, lightning strikes, or excessive voltage spikes beyond their rated capability. A failed TVS may short circuit, causing power supply issues or circuit malfunction, or it may fail open, leaving circuits unprotected. Replace TVS diodes if the radio has been exposed to lightning, severe static discharge, or exhibits power supply problems. Consider preventive replacement in radios used in harsh electrical environments.
Technical Specifications
- Type: Transient Voltage Suppressor (TVS) Diode
- Part Number: SM8S24A
- Standoff Voltage: 24V nominal
- Configuration: Bidirectional protection
- Package: SMA (DO-214AC) surface-mount
- Mounting: Surface-mount with two terminals
Part Numbers
- Motorola Part Number: 48012043001
- Component Designation: SM8S24A Transient Suppressor Diode
- Package Type: SMA (DO-214AC)
